Oil-well pick-up.



H. A. SILLS.

' OIL WELL PICK-UP. APPLICATION FILED NOV. 23, 1909.

Patentd Dec. 27,1910.

2 sums-sum 1.

, WASHINGTON, n. c.

H. A. SILLS.

OIL WELL PICK-UP.

APPLICATION FILED HOVJB, 19 09.

M. w M W "w 5 fl m HARRY A. SILLS, OF ROBINSON, ILLINOIS, ASSIGNOR 0F ONE-HALF TO LAFE SILLS, OF ROBINSON, ILLINOIS.

OIL-WELL PICK-UP.

Application filed November 23, 1909.

To all whom it may concern:

Be it known that I, HARRY A. SILLs, a citizen of the United States, residing at Robinson, in the county of Crawford and State of Illinois, have invented new and useful Improvements in Oil-VVell Pick-Ups, of which the following is a specification.

This invention relates to an oil well pick up, the object of the invention being to provide a means by which, when the driving rod of the apparatus becomes broken and allows the plunger to descend, said rod may after being repaired be conveniently adjusted into engagement with the power element again.

The invention consists of the features of construction, combination and arrangement of parts hereinafter fully described and claimed, reference being had to the accompanying drawings, in which Figure 1 shows the application of the invention to a conventional form of well pumping apparatus. Fig. 2 is an enlarged side elevation, showing the draft attachment applied for elevating the plunger. Fig. 3 is a detail view of the eccentric for driving the power rod. Fig. 4 is a longitudinal section through the bracket of the draft attachment. Fig. 5 is a perspective view of the locking dog thereof. Fig. 6 is a detail view showing the locking connection between the power rod and draft chain. Fig. 7 is a detail view of the coupling hook forming part of such connection.

Referring to the drawings, 1 designates an oil well tube of any ordinary construction in which operates the pumping plunger, the rod 2 of which, commonly called the sucker rod is coupled by a connection 3 to an ordinary vibrating bar 4 mounted upon a suitable frame support 5. The plunger is, adapted to descend by gravity and is elevated in operation by a bell crank lever 6 pivotally mounted for rocking movement in a horizontal plane, as at 7 The horizontal arm of this lever carries a rod 8 which engages and rocks the bar 4 in the vibrations of said lever, and the other arm of the lever is connected with a driving rod 9 mounted for reciprocating movement in suitable guide standards 10.

The pumping mechanism described is one in common use, and in practice motion is transmitted to the rod 9 through a power Specification of Letters Patent.

Patented Dec. 27, 1910.

Serial No. 529,640.

rod 11 operated by mechanism contained in a power housing 12. This mechanism includes in part a shaft 11 on which is mounted an eccentric 11 to which the inner end of the rod 11 is coupled, the shaft being driven in operation in any suitable manner. As shown, the outer end of the rod is formed or provided with a coupling member in the form of an oblong loop 13, adapted to engage a co-acting coupling hook 1 1 on the adjacent end of the driving rod 9. As the rod 11 reciprocates, it will be understood that the lever 6 is oscillated, alternately raising and lowering the bar 4:, whereby a corresponding motion is imparted to the pump plunger, which, on the release of the bar 4 by the descent of the arm 8, drops by gravity on its down stroke.

Fixed to the housing or to any other suitable support is' the usual relief rod 16 having the coupling loop 17 to receive the hook 15, as indicated in dotted. lines in Fig. 1, by which the driving rod, when disengaged from the power rod 9, may be coupled to said relief rod, so that the pump mechanism may be held in an elevated position when out of operation.

In the use of pump mechanism of this character the driving rod 9 is frequently broken, allowing the plunger to descend in the well tube. After the sections of the rod are repaired it is necessary tomanually elevate the plunger in order that the hooked end of the rod, which has been disengaged from the rod 11 during the operation of making repairs, may again be engaged with said rod 11 to set the pump mechanism into action. This is frequently a tedious, laborious and dangerous process, and the purpose of my invention is to provide a means by which this objection may be overcome and the plunger conveniently elevated and parts brought into position to be coupled by means of the power mechanism.

In carrying the invent-ion into practice, I provide upon the relief rod 16 a hook 17' arranged a suitable distance inwardly from the loop 17. With said hook 17 is adapted to be engaged the free end of the lower stretch 18 of a draft chain 18 which passes around a pulley 19 on a coupling bracket 20, which bracket has a looped end 21 to interchangeably engage the hooks 14 and 15. On the bracket is mounted a spring-actuated dog or pawl 22 to engage the links of the chain 18 to lock the same in adjusted position to the bracket, the free end of the upper .stretch 18 of said chain being adapted to be held in engagement with the loop 13 by a coupling hook or member 23. The coupling hook or member 23 has an offset or U- shaped portion 24 adapted for the passage therethrough of the chain, as shown in Figs. 2 and 6, and said hook is arranged in operation transversely across the upper side of the loop 13, so that said offset portion 24 will lie between the side arms of the loop. In connecting the chain stretch 18 with the loop 13, the free end of said stretch is passed upwardly through the loop and one of the links thereof drawn edgewise into the offset 24 of the coupling hook, the adjacent links of the stretch, which consequently lie across or at an angle to said offset, serving to prevent movement of the chain therethrough. It will thus be understood that the tension upon the chain will bind one of the linksthereof against the outer end of the loop 13 and within the offset portion of the coupling hook, thus fixing said stretch of the chain to the rod 11.

Assuming that the rod 9 has been broken and repaired, in which event the lever 6 will be at the limit of its forward stroke and the hook 14 at some distance from the loop 13 of the power rod 11, it is obviously necessary to draw the hook 14 to coupling position before it can be'engaged with said loop, in which operation the plunger will be simultaneously elevated. To accomplish this, the draft attachment is coupled to the power and relief rods and hook 15 of the driving rod, as before described and as clearly shown in Fig. 2. When the parts are thus coupled, upon the operation of the eccentric 11", the stretch 18 of the chain, being fixed to the rod 11, will be drawn upon on the inward movement of said rod, thus pulling the hooked end of the rod 9 toward the rod 11. On the for ward or outward movement of the rod 11, the dog or pawl 22 engages the adjacent link in the chain 18 and locks the chain from movement, so as to maintain the rod 9 in the position to which it has been adjusted. On such outward movement of the rod, 11, the chain section 18 becomes slackened, while the chain section 18 is held taut and such slack in the section 18 is taken up by the operator, who withdraws the chain from engagement with the offset of the coupling hook and draws the end of the chain through the loop 13 until it is taut and again interlocked with the loop by the coupling hook, in the manner previously described. It will thus be apparent that on each alternate inward movement of the rod 11 the chain 18 will be drawn upon to move the rod 9 farther toward the rod 11, the operator taking up the slack in the chain in each outward movement of the rod 11, until finally the hook 14 is in position to engage the loop 13. At this stage the chain stretch 18 is disengaged from the loop 13 and, while the draft connection and rod 9 are still held in position by the dog22, said hook 14 is engaged ing the necessity of performing this work in the usual laborious and dangerous way.

A single draft attachment of the character described may be employed for coupling the driving and power rods of any number of wells operating on this system, whenever the driving rod of the pumping mechanism of any well is broken and repaired. The advantages and conveniences of the device will thus be readily appreciated.

Having thus described the invention what is claimed as new is:

1. The combination with a well pump plunger, and its operating mechanism having a coupling member, of a driving element having a coacting coupling member, and means adapted to be engaged with said coupling members whereby the driving element is utilized to draw the members into engaged position in the event of their sepa ration.

2. In combination with a pump mechanism including a reciprocating rod having a coupling member, and a driving element provided with a coupling member, a draft connection adapted to be applied to a fixed support and connected with said members for operation by said driving element to draw the coupling members together for in terlocking engagement in the event of their separation.

3. In a pumping mechanism, the combination of a plunger, driving connections therefor including arod having a coupling member, a driving element having a coacting coupling member, a fixed element having a similar coupling member, and means for connecting said elements to utilize the power element to bring said driving element into position for the'engagement of its coupling element with the coupling members of the power element or fixed element.

4. In a pumping mechanism, a pump plunger, driving mechanism therefor including a rod having a coupling member, power mechanism including a rod having a coacting coupling member, a fixed support, a bracket adapted to be engaged with the driving rod and having a pulley thereon, a chain adapted to be terminally attached to the fixed support and power rod and passing around said pulley, and a pawl on said bracket to engage the links of the chain.

5. In a pumping mechanism, the combi nation of a plunger, driving connections therefor including a rod having a pair of coupling hooks disposed one below the other, an eccentrically driven driving element having a cooperating coupling member adapted to be engaged by one of said hooks, a fixed element having a coupling member adapted to be engaged by the other hook, a

bracket to be engaged with the latter-named.

hook of the driving rod, a pulley upon said bracket, a chain adapted to be connected to said fixed element and passing around the pulley on the bracket, means for connecting the chain to the coupling member of the eccentrically-driven power element, and a pawl upon the bracket to interlock with the links of the chain.

6. In a pumping mechanism, the combination of a pump plunger, driving connections therefor including a rod having a pair of upwardly and downwardly projecting coupling hooks, an eccentrically-operated driving element having a coupling member adapted to be normally engaged with the upturned hook, a fixed element having a coupling member adapted to be engaged by the downturned hook, a bracket adapted for engagement with the downturned hook, a pulley mounted thereon, a chain passing around said pulley and adapted to be connected at one end with said fixed element, a coupling pin adapted to extend across the coupling member of the eccentrically 0 erated driving element and having an 0 set portion to receive a pivoted connection of the links of the offset end of the chain therewith, and a pawl upon the bracket to interlock with the links of the chain.

In testimony whereof I affix my signature in presence of two witnesses.

HARRY A. SILLS. Witnesses:

THOMAS GORDON, HERMAN MARLEY. 

